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Match 6, 1928. 661,771

v. J. REDMOND ANTENNA Filed March 5. 1926 4; ATTORNEY Patented Mar. 6, 19.28.

um'rso stares riser vnvonnr J. VBEDMOND, on NEW roan, n. Y.

ANTENNA.

Application filed March 5, 1926. Serial No. 92,460.

This invention relates to an antenna for wireless telephone or telegraph and has for an object to provide an improved construction wherein a large number of independent antennae may be grouped together in a minimum spacev Another object of the invention is to provide an antenna structure wherein a large number of independent antennae may be arranged on a comparatively small roof of a building and held in such a position as not to interfere with each other mechanically or magnetically. i I

A. still further object of theinvention is L? to provide an antenna structure wherein a number of supporting members are provided designed to holdindepcndent antenna wires at dilierent angles so as to prevent interference of theelectrical impulses carried by the various wires.

In the accompanying drawings' Figure 1 is a perspective view illustrating an embodiment of the invention as applied to a comparatively narrow building.

Figure 2 is an enlarged fragmentary per"- spective view showing one of the bracing members illustrated in Figure 1.

Figure 3 is an enlarged view in elevation of one of the wire supporting cross bars and associated parts.

Figure 4 is an enlarged view of the supporting foot embodying certain features of the invention.

Figure 5 is a cross-sectional view of Figure 4. I p

In this specification, the expression anten 11a is intended to be understood as a complete antenna construction including the wires support and other means for use in telegraphic or telephonic communications for the reception or sending of messages. In the accompanying drawing, 1 indicates the roof of a building which is provided withlirewalls 2 of usual construction which are really extensions of the walls of the building. Connected at suitable points to the fire walls 2 are clamps 3 which are substantially U-shaped members straddling the firewalls and secured thereto in any desired manner, as for instance, by expansion bolts il. From each of the clamps 3 there is arranged a horizontal brace 5 and an inclined brace said braces extending to suitable uprights 7. In the accon'ipanying drawingthere are shown five uprights 7 connected with clamps 3 though a greater or less number might be used. In addition to the uprights 7 there are shown two uprights 3 connected to one set of uprights 7 by boards 9 and by bars 10 and 11. It will be noted. that the uprights 8, together with their associated uprights 7, forn an end framework while three uprights 7 form a second framework near the end of the building as illustrated in Figure 1.

For the purpose of clarifying the further description one set of frames may be designated as frame 12 and the other as frame 13. The frame 12 is braced and connected to the fire wall 2 by five of an, clamps 3 and associated parts while frame 13 is held associated with the fire wall by two clamps 3.

However each of. theuprights 7 is provided with a base 14: which is preferably formed of rubber in the form of a suction cup as shown in Figures 4i and. 5 when these uprights are first placed in position, the bases let are collapsed in the usual manner so that a desired adhesion or suction will be produced. This assists the braces 5 and 6 and the'clamps 3 in holding the respective frames against accidental movement. Connected to frame12 are cross bars 15, 16, 17 and 18, said cross bars being connected to the top bracing bars 11. The frame 13 is provided with a similar set of cross bars 19, .20 21 and 22 connected to the cross bar 11. If desired, additional cross bars could be mounted on the bars 10 and 10 but for the purpose of illustrating the invention the ar rangemcnt shown in Figure 1 illustrates how the antenna wires are mounted so as not to interfere with each other. Each of the cross bars 15 to 22 inclusive, is. provided with a pulley 23 at each end and each cross bar is preferably pivotally mounted in place by a suitable pin 24 as shown in Figure 3. ?ass-. ing through each of the pulleys 23 is a cord or rope 25 connected to an insulator 26 and to the opposite endof this insulator the re spective wires are connected. As indicated in Figure 1, there are provided two wires for each set of cross bars, namely, wires 27, 28, 29, 30, 31, 32, 33 and 34. The various ropes or cables 25 are connected to the boards 9 and 9 respectively by suitable means, as for instance, ordinary knobs 36 to which the cords are tied or fastened. In adjusting the various cords or ropes 25, they are made the proper length and so positioned as to simultaneously hold the wires taut and the various cross bars 15 to 22. at different angles whereby none of the wires 27 to 34 inclusive will be parallel but, on the contrary, will be at difl'erent angles to each other and preferably also arranged so that the Wires on any cross bar will be crossed; g

In wireless or radio antennae, it has been found that wiresarranged parallel to each other and within certain distance of each other will interfere as the electrical influence from one will pass to the other. Therefore, in a restricted area, as for instance, a comparatively narrow building, it is necessary to arrange the wires in some other manner than parallel if a large number are to be put on the roof as shown in Figure 1 and also if there is to be no interference. By crossing the wires and by having the wires extend at different angles to the horizontal as well as vertical, the electrical impulse on one wirewill not affect the electrical impulse on the other as the point where an interference might be had is only at or adjacent the point of crossing'which is, of-course,-spaced some distance apart. By arranging the various wires as shown in Figure 1 they are all at an'angle to the horizontal and at angles to each other even though the various cross bars are arranged on substantially parallel bars. If additional wires are used, care must be had to arrange them at different angles to each other and to wires already in use. It is, of course, evident that the wires as shown may be readjusted to some other angle it additional wires necessitate such adjustment. The arrangement of the wires at the different angles as described permits a large number of independent aerial wires to be used in avery restricted space and yet without interference.

l/Vhat I claim is:

1. An antenna structure adapted to provide a comparatively large number of antenna wires in a minimum space, said struc ture including a pair of supporting frames, a plurality of pivotally mounted bars on each frame, a pair of wires for each two bars whereby the wires are arranged in pairs, and means for fastening said bars to the fumes in such a manner that the wires of each. pair will cross and all of the wires will be so arranged that no two will be parallel. 2. An antennastructure comprising a series of cross bars, a pair of wires for each pair of cross bars, a flexible member for each cross bar for holdingthe same in a given position, said position causing the wires of the cross bar to cross, and means for supporting the cross bars with a minimum space therebetween in such a manner that the wires of one set of cross bars will not be parallel to the wires of any of the other cross bars.

3. An antenna structure comprising a pair of frames, a series of bars pivotally mounted on each or said frames, a pair of antenna wires for each pair of bars, said wires extending from the bars on one frame to the bars on the opposite frame, and a series of cords associated with each of said bars for holding the bars at ditlerent angles and thereby holding the various wires at different angles and out of parallelism.

4. An antenna structure comprising spaced supports, a spacing bar adjustably mounted on each support, spaced antenna wires connecting the spacing bars on opposite supports, said wires being insulated from each other, and means for adjusting the spacing bars relative to their supports for rendering the antenna wires non-parallel.

An antenna structure comprising spaced supports, a spacing bar pivotally mounted on each of said supports, antenna wires connecting the bars at spaced intervals and insulated from each other, and adj ustable means between the pivoted bars and their supports for disposing the bars angularly with respect to their supports whereby to render the antenna wires non-parallel.

6. An antenna structure comprising spaced supports, a spacingbar pivotallymounted on each of said supports, antenna wires connecting the wires at spaced intervals and insulated from each other, and flexible means extending from the bars to the supports and having connection with said wires for maintaining the wires taut and for maintaining the bars in adjusted angular position with respect to the supports whereby said wires are rendered non-parallel.

7. An antenna structure comprising spaced supports, a plurality of spacing barn pivotally mounted upon each of said supports, theseveral bars of each support being arranged in pairs, antenna wires connected at spaced intervals between the spacing bars of each pair, the wires being insulated from each other, and means associated with the wires and bars of each pair for maintaining the said wires taut and the several bars at different angles with respect to the supports and to each other, whereby to render said wires non-parallel.

VINCENT J. BEBE 0ND 

